Compilare: user.cpp: In function ‘long int maxx(std::vector<long int, std::allocator<long int> >)’: user.cpp:39: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘long int maxx2(std::vector<long int, std::allocator<long int> >)’: user.cpp:58: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int calc2(int, long int)’: user.cpp:85: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:117: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:118: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:120: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:130: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:135: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:139: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result